$11$ point

Given the following inventory system: average weekly $(7$ days a week$)$ demand is $1000$ units with standard deviation of $100$ units, order interval is $14$ days, lead time is $7$ days and the target servic probability is $90\%.$ Currently, inventory on hand is $50$ units.

What is the safety stock and the order quantity?

$286$ and $5,237$

$222$ and $3,172$

$314$ and $6,264$

$587$ and $21,537$

$515$ and $5,745$